<template>
    <div>
      <el-card shadow="hover">
        <el-form inline>
          <el-form-item label="选择统计项">
            <el-select v-model="queryInfo.type" clearable placeholder="请选择">
              <el-option label="学员登录数统计" value="login_num"/>
              <el-option label="学员注册数统计" value="register_num"/>
              <el-option label="课程播放数统计" value="video_view_num"/>
              <el-option label="每日课程数统计" value="course_num"/>
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-date-picker
              v-model="queryInfo.begin"
              type="date"
              placeholder="选择开始日期"
              value-format="yyyy-MM-dd" />
          </el-form-item>
          <el-form-item>
            <el-date-picker
              v-model="queryInfo.end"
              type="date"
              placeholder="选择截止日期"
              value-format="yyyy-MM-dd" />
          </el-form-item>
          <el-form-item>
            <el-button
              :disabled="btnDisabled"
              type="primary"
              icon="el-icon-search"
              @click="showChart">查询</el-button>
          </el-form-item>
        </el-form>

        <div class="chart-container" style="margin-top: 15px">
          <div id="chart" class="chart" style="height:500px;width:100%" />
        </div>
      </el-card>
    </div>
</template>

<script>
  import echarts from 'echarts';
  import staApi from '@/api/edu/sta'

  export default {
    name: 'list',
    data(){
      return{
        //统计查询参数
        queryInfo: {

        },
        btnDisabled: false,

        xData: [],
        yData: [],
      }
    },
    created() {

    },
    methods: {
      //查询数据
     async showChart(){
        const {data} = await staApi.showData(this.queryInfo);
        this.xData = data.dateList;
        this.yData = data.numList;
        this.setCharts();
      },

      //初始化Echarts
      setCharts(){
        // 基于准备好的dom，初始化echarts实例
        this.chart = echarts.init(document.getElementById('chart'))
        // console.log(this.chart)

        // 指定图表的配置项和数据
        let option = {
          title: {
            text: '数据统计'
          },
          //X轴触发提示
          tooltip: {
            trigger: 'axis'
          },
          //区域缩放
          dataZoom: [{
            show: true,
            height: 30,
            xAxisIndex: [
              0
            ],
            bottom: 30,
            start: 10,
            end: 80,
            handleIcon: 'path://M306.1,413c0,2.2-1.8,4-4,4h-59.8c-2.2,0-4-1.8-4-4V200.8c0-2.2,1.8-4,4-4h59.8c2.2,0,4,1.8,4,4V413z',
            handleSize: '110%',
            handleStyle: {
              color: '#d3dee5'

            },
            textStyle: {
              color: '#fff'
            },
            borderColor: '#90979c'
          },
            {
              type: 'inside',
              show: true,
              height: 15,
              start: 1,
              end: 35
            }],
          // x轴是类目轴（离散数据）,必须通过data设置类目数据
          xAxis: {
            type: 'category',
            data: this.xData
          },
          // y轴是数据轴（连续数据）
          yAxis: {
            type: 'value'
          },
          // 系列列表。每个系列通过 type 决定自己的图表类型
          series: [{
            // 系列中的数据内容数组
            data: this.yData,
            // 折线图
            type: 'line'
          }]
        }
        this.chart.setOption(option)
      }
    }
  }
</script>

<style scoped>

</style>
